How to save excel data in sql dynamically

Check the below example, this may help you.
using System;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using OfficeOpenXml;
using ExcelWorksheet = OfficeOpenXml.ExcelWorksheet;
using LicenseContext = OfficeOpenXml.LicenseContext;

namespace ExcelToSql
{
    public class ExcelProcessor
    {
        public void SaveExcelDataToSql(string excelFilePath, string connectionString, string tableName)
        {
			ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
            using (var package = new ExcelPackage(new FileInfo(excelFilePath)))
            {
                ExcelWorksheet worksheet = package.Workbook.Worksheets.FirstOrDefault();
                if (worksheet == null)
                {
                    Console.WriteLine("No worksheet found in the Excel file.");
                    return;
                }

                string insertQuery = $"INSERT INTO {tableName} VALUES ";

                for (int row = 2; row <= worksheet.Dimension.Rows; row++)
                {
                    var rowValues = Enumerable.Range(1, worksheet.Dimension.Columns)
                        .Select(col => worksheet.Cells[row, col].Value != null ? worksheet.Cells[row, col].Value.ToString() : "")
                        .ToArray();

                    string rowValueString = $"('{string.Join("','", rowValues)}')";
                    insertQuery += rowValueString + ",";
                }

                insertQuery = insertQuery.TrimEnd(',') + ";";

                using (var connection = new SqlConnection(connectionString))
                {
                    connection.Open();
                    using (var command = new SqlCommand(insertQuery, connection))
                    {
                        command.ExecuteNonQuery();
                    }
                }
            }
        }
    }
}